Anomalous Microwave Emission (AME) is a broad galactic-foreground component peaking between 20 and 60 GHz that is widely attributed to electric-dipole emission from rapidly-rotating ultra-small dust grains ("spinning dust"). Standard spinning-dust models, however, fail to fit the detailed spectral shape and environmental variations of AME, and the observed polarization fraction is anomalously low (Π < 1 to 2%) compared to predictions for aligned spinning grains (Hensley 2016; Dickinson 2018).
The standard interpretation assumes spinning dust grains are rotated by local environmental forces (gas density, radiation field, collisional excitation) and that polarization tracks grain alignment with the local interstellar magnetic field. Under that assumption, the emission spectrum, peak frequency, and polarization fraction should be predictable from local ISM parameters. The observed mismatches imply that something beyond local physics is shaping the AME signal.
SCT replaces the hot-dense-center with a superluminal collision and the thermalized debris field that became our visible universe. Critically, the collision deposited angular momentum J = μ(b × v_rel) at every nesting level of the resulting cosmic-web structure (P31, P32). This inherited angular momentum propagates through the nested gravitational hierarchy, from supercluster scales through galactic scales down to interstellar-medium scales, producing coherent rotational structure at every level.
At ISM scales, the inherited angular-momentum environment shapes both the dust-grain population properties and the spinning-dust rotation distribution. Grain rotation rates do not depend purely on local thermal and radiation conditions; they inherit a contribution from the larger-scale J-inheritance environment in which the dust is embedded. Different positions within the inherited J field produce different grain-rotation distributions, and therefore different AME spectra. The observed environmental variations in AME peak frequency and spectral shape are direct signatures of this inherited-J variation across galactic-scale structure.
The low polarization fraction is the same physics from a different angle. If spinning grains were aligned only with the local interstellar magnetic field, the polarization fraction should be substantial. But if grain alignment is partially scrambled by inherited rotational coherence on scales larger than the local magnetic-field coherence length, the net polarization signal averages to a lower value than pure local-alignment models predict. The observed Π < 1 to 2% is the predicted M3 signature of inherited-J scrambling at galactic-scale and larger.
The same underlying mechanism (collision-J inheritance through the nested cosmic-web hierarchy) produces the cluster spin scaling (r040, Tang et al. 2025), the satellite-plane alignments (r130, r131), the quasar polarization coherence at gigaparsec scales (r162), and the filament vorticity hints (r083). AME and the spinning-dust peak shifts (r191) are the small-scale ISM-level expression of the same large-scale collision-J-inheritance phenomenology that runs through the whole catalog. None of these requires its own separate fix. They are all consequences of the toggle from hot-dense-center to superluminal-collision-and-thermalized-debris-field, with the collision's inherited angular momentum imprinting coherent rotational structure at every nesting level.
If precision multi-frequency AME observations (Planck legacy + ground-based follow-up) demonstrate that spinning-dust polarization fraction matches standard magnetic-alignment predictions across diverse environments (with no excess depolarization correlated with cosmic-J-axis indicators), the M3 inherited-J contribution to AME is refuted.